The PBR is a reasonable suggestion. We don't use them anymore cause they are crudely made, but the material is definitely good at stopping squeeks.

The ABS function is undoubtably a poor or dirty wheel speed sensor. When the event takes place above 10kph you will get a light.

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Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician